Princely article in Canada (7)

I believe the answer is:

alberta

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'in canada' is the definition.
('Alberta' is part of 'canada')

I don't understand how the rest of the clue works.

(Other definitions for alberta that I've seen before include "part of Canada" , "Beat Lar up in Canada" , "Where is Jasper" , "Canadian province, capital Edmonton" , "Ratable (anag)" .)

I've seen this clue in the Evening Standard.

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